/**
 * Created by meirongcheng on 2018/5/16.
 */
function limitTextarea(self,txexID,nowleng) {
    $(txexID).on('propertychange input', function (event) {
        console.log($(this).val())
        var _val = $(this).val();
        _val = _val < 140 ? _val : _val.substr(0, 140);
        $(this).val(_val);
        $(nowleng).text(_val.length)
    });
}